Function swap

kdevplatform/serialization/indexedstring.cpp:296–319

namespace KDevelop {
void swap(IndexedString& a, IndexedString& b) noexcept
{
    using std::swap;

    if (a.m_index == b.m_index) {
        return;
    }
    swap(a.m_index, b.m_index);

    const bool aRc = shouldDoDUChainReferenceCounting(&a);
    const bool bRc = shouldDoDUChainReferenceCounting(&b);

    if (aRc == bRc) {
        return;
    }

    auto noLongerRefCountedIndex = b.m_index;
    auto newlyRefCountedIndex = a.m_index;
    if (bRc) {
        swap(noLongerRefCountedIndex, newlyRefCountedIndex);
    }
    deref(noLongerRefCountedIndex);
    ref(newlyRefCountedIndex);
}
}

QUrl IndexedString::toUrl() const